Detection of Circulating and Disseminated Neuroblastoma Cells Using the ImageStream Flow Cytometer for Use as Predictive and Pharmacodynamic Biomarkers

Swathi Merugu, Lindi Chen, Elizabeth Gavens, Hany Gabra, Mark Brougham, Guy Makin, Antony Ng, Dermot Murphy, Alem S. Gabriel, Michael L. Robinson, Jennifer H. Wright, Susan A. Burchill, Angharad Humphreys, Nick Bown, David Jamieson, Deborah A. Tweddle

Research output: Contribution to journalArticlepeer-review

25 Downloads (Pure)

Abstract

Purpose: Circulating tumor cells (CTCs) serve as noninvasive tumor biomarkers in many types of cancer. Our aim was to detect CTCs from patients with neuroblastoma for use as predictive and pharmacodynamic biomarkers. Experimental Design: We collected matched blood and bone marrow samples from 40 patients with neuroblastoma to detect GD2+/CD45− neuroblastoma CTCs from blood and disseminated tumor cells (DTCs) from bone marrow using the Imagestream Imaging flow cytometer (ISx). In six cases, circulating free DNA (cfDNA) extracted from plasma isolated from the CTC sample was analyzed by high-density single-nucleotide polymorphism (SNP) arrays. Results: CTCs were detected in 26 of 42 blood samples (1–264/mL) and DTCs in 25 of 35 bone marrow samples (57—291,544/mL). Higher numbers of CTCs in patients with newly diagnosed, high-risk neuroblastoma correlated with failure to obtain a complete bone marrow (BM) metastatic response after induction chemotherapy (P < 0.01). Ex vivo Nutlin-3 (MDM2 inhibitor) treatment of blood and BM increased p53 and p21 expression in CTCs and DTCs compared with DMSO controls. In five of six cases, cfDNA analyzed by SNP arrays revealed copy number abnormalities associated with neuroblastoma. Conclusions: This is the first study to show that CTCs and DTCs are detectable in neuroblastoma using the ISx, with concurrently extracted cfDNA used for copy number profiling, and may be useful as pharmacodynamic biomarkers in early-phase clinical trials. Further investigation is required to determine whether CTC numbers are predictive biomarkers of BM response to first-line induction chemotherapy.
Original languageEnglish
JournalClinical Cancer Research
Early online date1 Nov 2019
DOIs
Publication statusPublished - 2019

Research Beacons, Institutes and Platforms

  • Manchester Cancer Research Centre

Fingerprint

Dive into the research topics of 'Detection of Circulating and Disseminated Neuroblastoma Cells Using the ImageStream Flow Cytometer for Use as Predictive and Pharmacodynamic Biomarkers'. Together they form a unique fingerprint.

Cite this